Gorman-Rupp Pumps SF4A-X 1531245 and up - Manual (Page 46)

OM-06629 SF SERIES X‐PROOF PUMPS
PAGE E - 23 MAINTENANCE AND REPAIR
Torque the capscrews to the value shown in Table
E-1.
Impeller Face Clearance Adjustment
A clearance of .006 to .012 inch (15 to 30 mm) be­
tween the face of the impeller and the wear ring is
recommended for maximum pump efficiency.
Loosen the capscrews securing the pump casing
to the motor assembly. Measure the clearance be­
tween the impeller and wear ring. If the clearance is
too narrow, turn the adjusting screws in an alternat­
ing pattern to push the pump casing and suction
head away from the impeller until the proper clear­
ance is achieved. If the clearance is too wide, use
the previously removed hardware to draw the
pump casing and suction head toward the impeller
until the proper clearance is achieved.
When the face clearance is properly set, secure the
adjusting screws by tightening the jam nuts
against the back of the seal plate.
Final Assembly
If the pump is designed for guide a rail application
and guide shoe was removed for disassembly,
install a new guide shoe seal and secure the seal
and guide shoe to the pump casing with the pre­
viously removed hardware.
If the pump is designed for a stand application, se­
cure the pump to the stand with the previously re­
move hardware.
Use a suitable lifting device to reposition the pump
in the wet well or sump.
LUBRICATION
Seal Cavity
Before installing or removing the lubrica­
tion plugs, always make sure the pump is
completely cool, and clean the area
around the plugs to prevent contamination
of the oil.
Check the oil level in the seal cavity before initial
startup, after the first two weeks of operation, and
every month thereafter.
Check the oil level only when the pump
is cool. If the oil level plug is removed
when the pump is hot, pressure in the
seal cavity can cause hot oil to be
ejected as the plug is removed.
Remove the lubrication plugs as indicated in
Draining Oil. Position the pump upright and add
premium quality submersible pump oil through
one of the plug holes until the oil reaches the bot­
tom of the plug hole. Clean and re‐install the plugs.
The grade of lubricant used is critical to the opera­
tion of this pump. Use premium quality hydraulic oil
as specified in Table E-2.